An image processing device includes a calibrator that calibrates a pixel value of a pixel in image data. An output interface outputs to an image output device the image data calibrated by the calibrator, the image output device forming an image in accordance with the calibrated image data, wherein the reference pixel and the target pixel have a predetermined positional relationship.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An image processing device, comprising: a memory that stores a table, the table including a pixel value of a target pixel, a pixel value of a reference pixel, and a pixel value corresponding to the pixel values of the target pixel and the reference pixel, the target pixel and the reference pixel being included in an image shown by image data, the image including a plurality of pixels, each of the plurality of pixels having a pixel value, the reference pixel being a pixel other than the target pixel; a calibrator that calibrates a pixel value of a pixel included in the image shown by the image data, by using the table stored in the memory; and an output interface that outputs to an image output device the image data calibrated by the calibrator, the image output device forming an output image in accordance with the calibrated image data, wherein the reference pixel and the target pixel have a predetermined positional relationship.
2. An image-processing device according to claim 1 , wherein the image output device is an image-forming device having a plurality of nozzles, each of which ejects an ink droplet.
3. An image-processing device according to claim 1 , wherein the image output device is a display device that forms the output image by visible radiation.
4. An image-processing device according to claim 2 , wherein the reference pixel is a pixel formed by a reference nozzle that has a predetermined positional relationship with a target nozzle, the target nozzle being a nozzle that is used to form the target pixel.
5. An image processing device according to claim 4 , wherein the reference nozzle is adjacent to the target nozzle.
6. An image processing device according to claim 2 , wherein the reference pixel is formed by a target nozzle, the target nozzle being used to form the target pixel.
7. An image processing device according to claim 1 , wherein the table includes the pixel value of the target pixel, a pixel value of a first reference pixel, a pixel value of a second reference pixel, and a pixel value corresponding to the pixel values of the target pixel and the first and the second reference pixels, the first reference pixel and the target pixel having a predetermined positional relationship, the second reference pixel and the target pixel having another predetermined positional relationship.
8. An image-processing device according to claim 7 , wherein: the first reference pixel is adjacent to the target pixel; and the second reference pixel is adjacent to the first reference pixel.
9. An image-processing device according to claim 1 , wherein: the memory stores at least a first table and a second table; and a first line and a second line are orthogonal, the first line including a target pixel and a reference pixel of the first table, the second line including a target pixel and a reference pixel of the second table.
10. An image-processing device according to claim 1 , wherein the table includes M-number of pixel values of the target pixel and N-number of pixel values of the reference pixel, the numbers M and N being integers that satisfy M>N.
11. An image processing device according to claim 10 , wherein the number M equals a number of gradation that a reference nozzle can represent, the reference nozzle being a nozzle that forms the reference pixel.
12. An image processing device according to claim 10 , wherein: the table includes pixel values of at least two reference pixels, the two reference pixels including a first reference pixel and a second reference pixel; a distance between the second reference pixel and the target pixel is less than a distance between the first reference pixel and the target pixel; and the table includes M-number of pixel values of the target pixel, N1-number of pixel values of the first reference pixel, and N2-number of pixel values of the second reference pixel, the numbers M, N1, and N2 being integers that satisfy M>N2>N1.
13. An image processing device according to claim 12 , wherein: the second reference pixel is adjacent to the target pixel; and the first reference pixel is adjacent to the second reference pixel.
14. An image processing device according to claim 13 , wherein the reference nozzle is adjacent to the target nozzle.
15. An image processing device according to claim 10 , wherein the reference pixel is a pixel formed by a reference nozzle, the reference nozzle satisfying a predetermined positional condition relative to a target nozzle, the target nozzle corresponding to the target pixel.
16. An image-processing method, comprising: reading a table from a memory, the table including a pixel value of a target pixel, a pixel value of a reference pixel, and a pixel value corresponding to the pixel values of the target pixel and the reference pixel, the target pixel and the reference pixel being included in an image shown by image data, the image including a plurality of pixels, each of the plurality of pixels having a pixel value, the reference pixel being a pixel other than the target pixel; calibrating a pixel value of a pixel included in the image shown by the image data, by using the table stored in the memory; and outputting to an image output device the image data calibrated by the calibrator, the image output device forming an output image in accordance with the calibrated image data, wherein the reference pixel and the target pixel have a predetermined positional relationship.
17. A tangible computer readable medium storing a program for causing a computer device to execute: reading of a table from a memory, the table including a pixel value of a target pixel, a pixel value of a reference pixel, and a pixel value corresponding to the pixel values of the target pixel and the reference pixel, the target pixel and the reference pixel being included in an image shown by image data, the image including a plurality of pixels, each of the plurality of pixels having a pixel value, the reference pixel being a pixel other than the target pixel; calibrating of a pixel value of a pixel included in the image shown by the image data, by using the table stored in the memory; and outputting to an image output device the image data calibrated by the calibrator, the image output device forming an output image in accordance with the calibrated image data, wherein the reference pixel and the target pixel have a predetermined positional relationship.
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July 5, 2006
July 6, 2010
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